Clamping ring assembly



w. BRUNING ETAL CLAMPING RING ASSEMBLY Filed May 11, 1939 2 Sheets-Sheet l May 18, 1943. w, BRUMNG ETAL 2,319,762

CLAMP ING RING ASSEMBLY Filed May ll, 1939 2 Sheets-Sheet 2 ZZoyaZ fl. 5377207250721,

quazflwwy Patented May 18, 1943 2,319,762 CLAMPING RING ASSEMBLY William Bruning, Port Richmond, N. Y., and

Lloyd D. Simonson, Rochelle Park, N. J., assignors to Atlas Steel Barrel Corporation, Bayonne, N. J., a corporation of New Jersey Application May 11, 1939, Serial No. 273,088

9 Claims.

This invention relates to clamping rings primarily for metal drums of the full removable head type and has particular reference to an improved closure mechanism for such rings.

The type of ring customarily used for this purpose is a split metal ring, channeled in cross-.

section, having means associated therewith for forcing the ring ends apart and drawing them together about the assembled drum and drum head or cover. An object of the invention is to eliminate the binding action which frequently occurs when the ring ends are drawn together to clamp the drum head down upon the drum.

A further object of the invention is to so arrangetthe linkage in conjunction with the ends of the ring and the actuating lever whereby the ring ends are pulled together that substantially all the effective force on the ring ends during closing movement of the lever operates circumferentially in close proximity to the ring itself.

An important feature of the invention resides in a means for accomplishing the above described objectives and at the same time insuring a fluidtight seal at the ring ends themselves. This is accomplished by vso arranging the linkage that during closing movement of the actuating lever a definite radial pull inwardly is imparted to both ends of the ring, thereby creating a snug engagement of each end with the periphery of the assembled drum and drum head.

Various other objects and meritorious features of the invention will be apparent from the following description taken in conjunction with the drawings, wherein like numerals refer to like parts throughout the several figures, and where- Figure 1 is a plan view of the functional parts of the improved ring in operative position upon adrum;

Fig. 2 is a View similar to Fig. 1 illustrating the parts in closed position;

Fig. 3 is a section along 3-3 of Fig. 2;

Fig. 4 is a section along 44 of Fig. 2;

Fig. 5 illustrates a slight modification; and

Fig. 6 is a section along 6-6 of Fig. 5. 7

Referring now to the drawings, and particularly to Fig. 3, the numeral It! represents the wall of a metal drum. This Wall is curled over along the top margin thereof a indicated at 12 to seat the peripheral flange M of a full removable drum head I6. It is customary to use a gasket l8 as indicated to insure a fluid-tight seal.

A clamping ring 20, channeled in cross-section as illustrated in Fig. 3, is customarily drawn up tight about the assembled drum and drum head to seat the head firmly upon the gasket.

Referring now more particularly to the im-' proved closing mechanism here involved, each end of the ring is provided with an inwardly extending lug as indicated at 22 and 24. A rigid arcuate arm 26 of substantially the same curvature as that of the ring itself extends circumferentially'from lug 22 toward the other end of the ring.

The invention in its broadest form comprises athird lug 28 circumferentially removed from lug 24 to which an operating lever 30 is pivotally secured as indicated at 32. A substantially rightangulated link 34 is pivotally connected to the end of arcuate arm 26 at 36 and similarly secured to lever 30 at 38, a point intermediate the extremities of the lever.

Means are provided intermediate the pivoted end of lever 30 and the ring extremity to which inner extremity of lug 24 together with a projection 42 depending from said lug in spaced relation tothe lip. The arcuate arm 26 rides between these two guide elements as it moves circumferentially during opening and closing of the ring; As illustrated in Fig. 3, lip 40 may be bent under as indicated at 42a to provide a partial support for the arcuate arm during its circumferential movement.

In the form illustrated in Figs. 5 and 6 the meta1 on the upper portion of the ring between lugs 24 and 28 is somewhat enlarged as indicated at 44 and a lip 46 depends therefrom along a sub stantial part of the distance between said lugs.

It is to be noted that the fulcrum points at which closing force is exerted on the ends of the ring are spaced from and operate away from the two respective ring ends. This creates a tendency during closing movement to draw the ring ends gradually inwardly. By virtue of this linkage arrangement the pull exerted on the ring ends is substantially circumferential and an even drawing of the ends toward one another is insured, the tendency to bind being substantially eliminated. The guide means along which extension arm 26 passes positively limits the circumferential-movement of the split ends and the entire force exerted on operating lever 36 is transmitted; to the ring ends in the desired di rection. reducing to a minimum the wasted component forces necessarily inherent in other forms of linkage.

Link 34 is preferably curved and deformed as indicated at 48 adjacent its pivotal connection to the end of arcuate arm 26, thereby limiting swinging movement ,of the link with reference to the arcuate arm in a counterclockwise or ring opening direction. This arrangement enables counterclockwise movement of lever 30 to force the arm 26 in a direction to open the ring ends.

An additional feature of the invention resides in a further deformation of the link 34, indicated at B. This deformation is adapted to cooperate with the side wall of lever 30 near its pivoted end to impart a distinct radially inward movement to the split ends of the ringduring final closing movement of the lever. In Fig. 2 the assembly illustrated in full line shows the position of the parts just before this final movement of lever 30. It is to be noted that at this point the deformation 50 in link 34 bears against the end of the lever. Fully closed'positi'on is illustrated in dotted lines and it will be noted that the link 34 has been forced radially inwardly somewhat. This movement is transmitted through pivot 35 to the end of arcuate arm 26, thus causinglug 22 to move directly radially inwardly and, by virtue of the guide means associated with lug 24,'this lug 'is'forced radially inwardly along with lug 22. This final distinct radially inward movement is imparted to link '34 because, after abutment of deformation EU'With lever 38, further movement of the lever about its fixed pivot 32 cannot cause further relative move ment between lever and link and the link is therefore cammed inwardly with the aforesaid desirable result. This'fi'nal movement imparted to the ends of the ring assures a neat, fluid-tight engagement of the ends of the ring about the assembled drum and drum head.

While the particular structure of the'various elements heretofore defined is not a problem before us insofar as this invention is concerned, the lever illustrated is bifurcated adjacent its pivoted end, from a point indicated at 52 in Fig; 1. The bifurcations lie on each side of lug 28 at the pivotal point. The lever is otherwise U-shaped in cross-section and, during opening movement of the ring, the inner extremity 52 of the bifurcation will bear against the inner periphery of link 34 to limit pivotal movement of the lever with reference to the link in this direction.

The exact form of link 34 is not material, although in the embodiment illustrateda double link is shown. The two link portions are contiguous at the point of pivotal connection of the lever between the bifurcations thereof, but spread slightly apart to provide the deformation 5%, the cooperation of which with the end of the lever during final closing movement has already 1. A clamping member comprising a split channeled ring, an arcuate arm secured to and projecting beyond one end thereof, an operating lever pivotally connected adjacent one of its ends with said ring at apointarcuatelyremote from the other end of the latter, a link pivotally connecting the free end of said arm with said lever at a point between the free end of the latter and its pivotal connection with the ring, and guide means associated with the ring between its pivotal connection with the lever and the adjacent free end of the ring cooperable with said arm to retain the latter in spaced relation to the ring.

2. A clamping member comprising a split channeled ring, an arcuate arm secured to and projecting-beyond one end thereof, an operating lever pivotally connected adjacent one of its ends withsaid ring at a point arcuately remote from the other end of the latter, a link pivotally connecting the free end of said arm with said lever ata point between the free end of the latter and its pivotal connection with the ring, and guide means associated with the ring between its pivotal connection with the lever and the adjacent free end of the ring cooperable with said arm to retain the latter in spaced relation to the ring, said guide means comprising a lug extending laterally'away from the free end of said ring and having a projection thereon adapted to receive said arm.

3. A clamping member comprising a split channeled ring, an arcuate arm secured to and projecti'ng'beyond one end thereof, an operating lever pivotally connected adjacent one of its ends with said ring at a point arcuately remote from the other end of the latter, a link pivotally connectingthe free end of said arm with said lever at a point between the free end of the latter and its pivotal connection with the ring, guide means associated with the ring between its'pivotal con-' nection with the lever and the adjacent free end of the ring cooperable with said arm to retain the latter in spaced relation to the ring; said guide means comprising a lug extending laterally away from the free end of said ring havinga projection portion limiting movement 'of the arm in one radial direction, and an enlarged ring portion extending between the point of pivotal engagement of the lever with the ring and the adjacent free end thereof having a depending portion operable to'limit radial movement of 7 the" arm in the other direction.

4. A clamping member comprising a split channeled ring, an arcuate arm secured to one end of said ring inwardly thereof and projecting beyond said end, an inwardly extending lug associated with the other end of said ring, a second inwardly extending lug spaced circumferentially from said first-mentioned lug, a lever pivotally connected to said last-mentioned lug; a link pivotally connecting the end of'said arcuate armwith said lever at a point intermediate the ends thereof, and guide means associated with said end lugadapted to' receive the arcuate arm and guide the same during opening and closing of the ring.

5. A clamping member comprising a split channeled ring, an arcuate arm secured to one end of said ring inwardly thereof and projecting beyond said end, an inwardly extending lug associated with the other end of said ring, a second inwardly extending lug. spaced circumferentially from said first-mentioned lug, a lever pivotally connected to said last-mentioned lug, a link pivotally connecting the end of said arcuate arm with said lever at apoint intermediate the'ends thereof, said link including means cooperable with the extremity of said lever for imparting a radially inward movement to the ends of said ring during final closing movement of the lever, and guide means associated with said end lug adapted to receive the arcuate arm and guide the same during opening and closing of the ring.

6. A clamping member comprising a split channeled ring, an arcuate arm secured to one end of said ring inwardly thereof and projecting beyond said end, an inwardly extending lug spaced circumferentially from the other end of said ring, a lever bifurcated at one end and pivoted at said end to said lug, and a link pivoted at one extremity to the end of said arcuate arm and at the other between the bifurcations of said lever, said link including a deformed portion adjacent its pivotal connection with said lever cooperable with the bifurcation of the lever to force the end of said arcuate arm radially inwardly during the final stage of closing movement of the lever.

7. A clamping member comprising a split channeled ring, an arcuate arm secured to one end of said ring inwardly thereof and projecting beyond said end, an inwardly extending lug associated with the other end of said ring, a second inwardly extending lug spaced circumferentially from said first-mentioned lug, a lever bifurcated at one end and pivoted at said end to said lastmentioned lug, a link pivoted at one extremity to the end of said arcuate arm and at the other between the bifurcations of said lever, said link including a deformed portion adjacent its pivotal connection with said lever cooperable with the bifurcation of the lever to force the end of said arcuate arm radially inwardly durin the final stage of closing movement of the lever,

and guide means associated with said end lug adapted to receive the arcuate arm and guide the same during opening and closing of the ring.

8. A clamping member comprising a split channeled ring, inwardly extending lugs adjacent each end, guide means on the under face of one lug, an arcuate extension of substantially the same curvature as the ring extending from said other lug past said guide means in spaced relation to the ring end associated with the latter, an operating lever pivotally connected with the ring adjacent a point arcuately remote from said last-mentioned end, and a link pivotally connecting the end of said arcuate extension with a point on said lever removed from its pivotal connection with the ring.

9. A clamping member comprising a split channeled ring, an arcuate arm secured to and projecting beyond one end thereof, an operating lever pivotally connected adjacent one of its ends with said ring at a point arcuately remote from the other end of the latter, and an angulated link pivotally connecting the free end of said arm with said lever at a point between the free end of the latter and its pivotal connection with the ring, said link including a deformed portion adjacent its pivotal connection with the WILLIAM BRUNING. LLOYD D. SIMONSON. 

